git subrepo push on pristine remote fails when LANG!=C

[joluxer]

Hello, interesting tool, that I want to improve.

My problem arised as follows:

• checked out some repository by git clone
• created a subrepo by git subrepo init
• tried to push by git subrepo push, getting error: git-subrepo: Fetch for push failed: fatal: Konnte Remote-Referenz master nicht finden., which is essentially "could not find remote reference for master".
• Finally succeeded by setting LANG=C. Did the latter to get english error message, but ended up with push success.